I was wondering if there is any way to check if an object is specifically a Date in JavaScript. isType returns object for Date, which isn't enough for this scenario. Any ideas? Thanks!
...
Can't seem to find how to check if an object is a boolean easily. Is there something like this in Ruby?
true.is_a?(Boolean)
false.is_a?(Boolean)
Right now I'm doing this and would like to shorten it:
some_var = rand(1) == 1 ? true : false
(some_var.is_a?(TrueClass) || some_var.is_a?(FalseClass))
...
I would like to write a routine like printf, not functionally-wise, but rather I'd like the routine to have the same time compile check characteristics as printf.
For example if i have:
{
int i;
std::string s;
printf("%d %d",i);
printf("%d",s.c_str());
}
The compiler complains like so:
1 cc1plus: warnings being treated a...
For purposes of type checking I would like to define a function on the lines of
void myfunc(type1 a, type2 b)
{
...
}
where type1 and type2 are both typedefed to uint8_t. So far so good, but for sanity and checking purposes (think DbC) I would like to prevent the function being called with a type2 value for the first parameter or a t...
What would be the best way to check in an object being passed into a method extended a given class?
Currently i have a method that takes a ByteBuffer of data to send and a 'player' class that i wrote, and queues the data up on the IO server to be sent to the client:
public void send(ButeBuffer toSend, Player player)
{
// prep the byt...
scala> class A
defined class A
scala> class B
defined class B
scala> val a: A = new A
a: A = A@551510e8
scala> a match {
| case _: B => println("unlikely")
| case _ => println("no match")
| }
no match
In the example above shouldn't the compiler tell me that one of the cases can never match? A slightly more complicated...
symbolic constant- no type checking->the value is just substituted
enumeration- more type safe than symbolic constant
constant variables- most type safe
Anything else that can be added here?
Any difference in terms of space occupied by these?
...
I know that checking types in Python is bad and you should probably never do it. But I can't seem to find the disadvantage to this.
class O(object):
def __init__(self, name):
'''Can only be called in derived classes.'''
if type(self) is O:
message = "%(class)s cannot be instantiated, it must be ...
Hi,
Say i have a class hierarchy of domain objects with one base class and a couple of child classes, one level.
Let say I have a list of those objects (list of the base class) and I want to apply some logic to the classes that I feel don't really belong to the classes (eg. design/UI specific code).
What are my alternatives ?
If-is ...
I have an interface "IPartyCountService" that counts number of customers and number of suppliers.
The implementation class "PartyCountService" makes use of type checking to check whether the party is a Customer or a Supplier.
My question is: does the implementation class PartyCountService's use of type checking give out code smell? Ple...
I need to know if a Type implements an interface.
Dim asmRule As System.Reflection.Assembly = System.Reflection.Assembly.LoadFrom(System.IO.Path.Combine(AppDomain.CurrentDomain.BaseDirectory, "Rule.dll"))
For Each typeAsm As System.Type In asmRule.GetTypes
If TypeOf typeAsm Is Rule.IRule Then
'that does always return fa...